Hey guys, this is a sort of server related question. I have a HP xw8600 workstation that I just purchased a few weeks ago. Right now it has 4Gb of Hynix PC2-5300/DDR2 667Mhz RAM, ECC class with 2x Xeon 5260 3.33Ghz chips. I'd like to swap 2x Xeon E5472 chips in place of the dual core chips. However, I read somewhere that supposedly you are supposed to use DDR2 800 RAM with 1600Mhz FSB chips. Yet I've seen at least one setup in which a computer(in this case a Dell T7400 Precision workstation) has E5472 chips along with DDR2 667/PC2-5300 RAM. So can I use the E5472's with the DDR2 667 RAM that I have right now or am I stuck buying DDR2 800 RAM?

Thanks in advance.